Building block



Patented Aug. 4, .1925.

UNITED STATES DAVID mm'rvnn, or nn'rnorr, momma.

BUILDING BLOCK.

Application filed August 23, 1922. Serial in. 583,689.

To all whom it may concern:

Be it known that I, DAVID MCINTYRE, a citizen of the United States, and residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and Improved Building Block, of which'the following is a specification.

This invention relates to the construction of machine molded building blocks, and its object is to rovide a block of this character with suitab e air spaces and partitions between them to brace the outer walls of the block, the outer walls and the ends of the partitions being widened at one surface of the block to supply sufiicient area to receive mortar. Another object of this invention is to provide a block of this character which can be readily subdivided without waste. A further object of this invention is to provide a block of this character with a central transverse partition which facilitates the handling thereof, one end of this partition 'being widened so that the block can easily be carried.

In the accompanying drawing, Fig. 1 is a plan ofmy improved block. Fig. 2 is a section in the line 22 of Fig. 1. Fig. 3 is a plan of a modified form of block.

Similar reference characters refer to like parts, throughout the several views.

The block shown in Fig. 3 comprises end walls 1, side walls 2, main partition walls 3 and a central inner partition wall 4 con-' meeting the middle portions of the main partition walls 3.. The end and sidewalls are formed with inwardly extending flanges or ledges 5 at what is the upper face of the block when in a building to afford space to receive morta-r'in which the lower edges of these walls of another block may rest.

The upper end of the central partition 4 is also shown formed with flanges 'on ribs 6 to facilitate handling of the block, slipping being thereby prevented.

It often happens that a building block is too long, and as these blocks are usually made of concrete'or terracotta which have no line of cleavage, many blocks are broken into uselas pieces in the attempt to shorten them. Ihave found that forming the main partition walls of two parallel thicknesses 7 with air spaces 8 between themfiprovides a block which can be shortened by striking the side walls of the block along this air space with the edge of a masons trowel.

The air spaces 8 are preferably narrow so that the walls 2 will break along substantially straight. lines, These air spaces are also preferably spaced about one-fourth the length of the block from the adjacent ends so that sectional blocks one-fourth, one-half and three-fourths of the length of the original block can be readily obtained. Furthermore, because of these division spaces which permit. breakage along straight lines, substantially no loss occurs.

. The proportions of the partitions and their number and the sizes of the air spaces may all be changed by those skilled in the.

art without departing from the spirit of my invention as set forth in the following and two partition Walls parallel to each other, two other outer walls connecting to the ends of the first four walls and adapted to be broken from the ends of the two partition walls to reduce the length of the block, and an inner partition wall connecting the middle portions of the other partition walls said parallel partition walls being formed of two parallel parts separated by narrow air spaces, the outer walls of the block and the said inner partition wall having ledges at their upper ends.

2. A building block substantially rectangular in area comprising twoouter walls and two'partitionj walls parallel to each other, two other outer walls connecting to the ends of the first four walls, and an inner partitionwall connecting the middle portions of the other partition walls, said parallel partition walls being formed of two parallel parts separated by narrow air spaces.

3. A giilar in area comprising two outer walls and two partition walls parallel to each other, two other outer walls connecting to the ends of the first four walls, and an inner partition Wall connecting the middle portions of the other partition walls, said parallel partition, Walls being formed of two parallel parts separated by narrow air spaces, thedistance between said air "spaces in the partition walls being substantially half. the length of the block.

DAVID MCINTYRE.

building block substantially rectan- 

